A Built-in infrared and radio frequency receiver supports your screens on-wall or in-ceiling application for a clean appearance. Standard built-in Low Voltage Controller (LVC), a 12V trigger port can be connected to your projector trigger point, this enables synchronization between the drop/rise cycle of your screen and the power cycle of the projector. You could extend this port using a standard RJ45 connector and CAT-5 cable to anywhere in the room. Or mount your wall-switch like a regular light switch.